Unpopular response: Didn't he verbally tell you it'll cost $30K? 

Only thing I will add is if you rent by the room, you also have to factor in landscaping costs (mowing the grass) and ideally cleaning of common areas (eg weekly cleaning service).  

,My stable consists of:1982 Mercedes-Benz 300D Turbodiesel - 27mpg regularly, few repairs, 192k miles, low insurance1998 Mercury Mountaineer, 16mpg, reliable so far. 130k miles2001 Mercedes-Benz E320 21mpg, reliable, 115k miles.My personal favorite is the 82; my costs are so low and it keeps me from speeding.

Financially speaking, I'm still saving, but the goal is 50k saved up (all costs: closing, fees, down payment, portion of rehabbing costs) by this summer with my fathers help on the cash all while I continuously save 50-80% of my work checks to fund for rehabbing this property and I work off my second job and "survive off of that."

Then have a Roofing contractor go out to the property and tell you how much it will cost to fix the problem.

We're funding deals with as little as title costs/insurance to close for experienced borrowers.

What if the $2,600 sewer repair actually should have cost $4,300?

One owner is looking to exit to middle to high sevens on yield on cost.Cap exits are high 5’s, low 6’s for some Class A product.Turnover cost projections should escalate: $500 first year, $850 second year, $1000 third year.Consolidation and density of BFR assets can be an issue for insurance companies.

The second tenant stopped paying and it took me 4 months to get them evicted and more turnaround cost. 

It costs about $200.